Rotor



FIG. 1 is a perspective frontal-side view of a rotor;

FIG. 2 is a view from one side thereof;

FIG. 3 is a view from the other side thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrate the portions of the rotor that form no part of the claimed design. 

CLAIM The ornamental design for a rotor, as shown and described. 